Here is the a Veeam One Reporter screenshots, look at the high peaks.
I have now some more information. I use HP Data Protector for backing up the MSSQL server machine behind the Veeam One Monitor machine. I do a transactional backup every hour and every 24 hours I do a full backup.
That 26 October, I see my Data Protector was crashed while performing a transactional backup. All other transactional backup that were scheduled where not executed without any error message.
We restarted the Data Protector server the after (27 October) and saw the transactional backups were OK.
Should it be possible that Data Protector crashes on such manner that it corrupts (data loss) the database that is is being backed up?